As known by several people, I'm planning on visiting a Weird Al-concert in America. You also know that I'm from The Netherlands so I can't drive by car

So, my question is:
What's the most cheap (to fly) and less travel concert for me to visit?
I need a place to sleep also. So,
- Where is the nearest airport to the concerts? You probably understand that I also need a way to transfer from the Airport to the concert / hotel. I will be 21 when the concerts start.
- The coolest thing would be to fly to America and visit 2 concerts, so is there a chance for visiting 2 (or more) concerts within a week?
- Hotel? Where and how much (I guess I need to visit a travel agency here to book one together with a flight)
- Car renting? How much and can this be done on the Airport (I am 21, I have a european drivers license and got a Credit Card
